To turn a suitable abstract class method into an interface
  1. Place the caret at the name of an abstract class in the editor, in the File Structure window, in Class View or Object Browser.
  2. Do one of the following:
    • On the main menu, choose ReSharper | Refactor | Convert | Abstract Class to Interface.
    • Press Ctrl+Shift+R, then click Convert Abstract Class to Interface.
  3. If no conflicts are identified, the abstract class is converted into an interface with the same name. At the same time, modifiers of methods are changed accordingly. Otherwise, resolve conflicts.